The effects of surface oxidation and segregation on the adhesional wear behavior of aluminum—bronze alloys

Poggie, Robert A.; Wert, J.J.; Harris, Lawrence A.

doi:10.1163/156856194x00023

Cited by 15 publications

(8 citation statements)

References 23 publications

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“…This might be further supported by evidence of more severe surface damage (figures 15(a) versus (d) and figures 16(a) versus (e)). The probability of a bond forming between the mating surface and the counter face would rise, in accordance with Poggie et al, as a result of the diffusion of aluminium towards the mating surface, making the alloy more susceptible to adhesion and raising the adhesive wear phenomenon [55].…”

Section: Sliding Wear Behaviour 431 Wear Under Dry Conditionsupporting

confidence: 75%

“…By reducing the amount of direct metal-tometal contact, such areas and entrapped/adhering debris minimize the severity of material removal. According to figures 9 and 12, the abrasive action brought on by the trapping of hard debris is to account for the initially rapid rate of rise in frictional heating and friction coefficient with test duration [55]. These solid debris fragments are produced in anticipation of yielding, followed by work hardening, fragmentation, and trapping of the originally contacting asperities on the sliding surfaces [55,56].…”

Section: Sliding Wear Behaviour 431 Wear Under Dry Conditionmentioning

confidence: 99%

“…According to figures 9 and 12, the abrasive action brought on by the trapping of hard debris is to account for the initially rapid rate of rise in frictional heating and friction coefficient with test duration [55]. These solid debris fragments are produced in anticipation of yielding, followed by work hardening, fragmentation, and trapping of the originally contacting asperities on the sliding surfaces [55,56]. Increasing numbers of deformations come into touch as a result of the initial contacting abrasive particles yielding and fragmenting, increasing the effective contacting surface area and reducing the stress on the remaining asperities.…”

Section: Sliding Wear Behaviour 431 Wear Under Dry Conditionmentioning

confidence: 99%

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Evaluation of physical, mechanical and sliding wear properties of in-situ AB-TiC composite: a comparison with NAB alloy

et al. 2023

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The present study compared the physical, mechanical, and sliding wear response of cast in situ aluminium bronze (AB)-TiC [(Cu10Al3Fe)5TiC] composite to that of cast nickel aluminium bronze (NAB) [Cu10Al5Ni5Fe] alloy. To investigate wear loss, frictional heating, and friction coefficient, a pin type test material was employed against a rotating heat-treated EN-31 steel disc to conduct sliding wear test in dry and partially lubricated conditions. The NAB alloy exhibit higher tensile strength (32.7%), compressive strength (7.68% at room temperature and 4.18% at 500 oC), hardness (8.78%), and density (3.17%), whereas the AB-TiC composite showed higher thermal conductivity 4.89% than the NAB alloy. In terms of wear resistance under dry sliding conditions, composite outperformed NAB alloy up to a threshold applied load and/or sliding speed, beyond which the trend altered. Increasing sliding speed resulted into reduce wear transition load, while friction coefficient showed a mixed trend. Under lubricated test conditions, AB-TiC composite displayed considerably higher wear resistance (50.08%, 44.41% & 51.55%) and friction coefficient (26.37%, 40.75% & 14.96%) than the NAB alloy when tested in only oil, oil with 100 µm graphite and oil with 7-10 µm graphite respectively. Arrival of seizure in general caused significantly higher wear loss and temperature rise which caused large adhesion of specimen material to the disc surface. The reported wear behaviour of the samples has been validated using the features of wear surfaces and subsurface regions. The analysis significantly shows good impacts of the oil lubrication in terms of decreasing wear rate, frictional heating, and friction coefficient. Formation of steady lubricating film was reported to be responsible for the better wear performance. Furthermore, irrespective of material composition and microstructure, there exists a precise set of test parameters leading to optimal wear performance wherein the beneficial impacts of load bearing capability, thermal stability of various phases predominates.

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Section: Sliding Wear Behaviour 431 Wear Under Dry Conditionsupporting

confidence: 75%

Section: Sliding Wear Behaviour 431 Wear Under Dry Conditionmentioning

confidence: 99%

Section: Sliding Wear Behaviour 431 Wear Under Dry Conditionmentioning

confidence: 99%

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Evaluation of physical, mechanical and sliding wear properties of in-situ AB-TiC composite: a comparison with NAB alloy

et al. 2023

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“…It seems that the Al 2 O 3 oxide layer generated due to interfacial friction heating fractures and traps between the specimen surface and counterface and leads to more material removal. 15 Because of the ineffective action of Al 2 O 3 in preventing interfacial interaction, this effect can be intensified by increasing the aluminium content in Cu-Al alloys. In contrast, formation of Cu 2 O with the strong adherence on surfaces of A1 and A2 alloys can effectively reduce interfacial interaction between sliding materials.…”

Section: Wear Testmentioning

confidence: 99%

“…Wear resistance can be considered inverse of volume loss. It seems that the Al 2 O 3 oxide layer generated due to interfacial friction heating fractures and traps between the specimen surface and counterface and leads to more material removal 15. Because of the ineffective action of Al 2 O 3 in preventing interfacial interaction, this effect can be intensified by increasing the aluminium content in Cu-Al alloys.…”

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confidence: 99%

Wear behaviour ofin situCu–Al₂O₃composites produced by internal oxidation of as cast alloys

Soleimanpour

Abachi

Purazrang

2009

Tribology - Materials, Surfaces & Interfaces

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In the present study, the wear behaviour of Cu-Al 2 O 3 composites and Cu-Al alloys has been investigated. The experiment involved casting of Cu-Al alloys with 0?37, 1, 2 and 3 wt-% of aluminium under inert gas atmosphere. The composites were produced by internal oxidation of alloys at 950uC for 10 h in presence of Fe 2 O 3 and Al 2 O 3 powders mixture. The microstructures of composites were studied using SEM and atomic force microscopy. To identify wear behaviour of specimens, dry sliding pin-on-disk wear tests were conducted according to ASTM G99-95a standard. The normal loads of 20, 30, and 40 N were applied on specimens during wear tests. The sliding speed and distances were selected as 0?5 m s 21 and 500, 1000 and 1500 m respectively. To specify the wear mechanisms, the worn surfaces of composites were examined by SEM equipped with EDX. According to wear test results, increasing applied load and sliding distance leads to more volume loss in all specimens. Composites represent better wear resistance in comparison to alloys. Additionally, increasing the volume fraction of alumina particles in composites enhances the wear resistance, especially under high applied load. The wear mechanisms are mainly abrasion, oxidation and delamination.

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How Tribo‐Oxidation Alters the Tribological Properties of Copper and Its Oxides

Lehmann

Schwaiger

Rinke

et al. 2020

Adv Materials Inter

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Tribochemical reactions in many applications determine the performance and lifetime of individual parts or entire engineering systems. The underlying processes are however not yet fully understood. Here, the tribological properties of copper and its oxides are investigated under mild tribological loading and for dry sliding. The oxides represent the late stages of a copper–sapphire tribo‐contact, once the whole copper surface is covered with an oxide. For this purpose, high‐purity copper, thermally‐oxidized and sintered Cu2O and CuO samples are tribologically loaded and eventually formed wear particles analyzed. The tribological behavior of the oxides is found to be beneficial for a reduction of the coefficient of friction (COF), mainly due to an increase in hardness. The results reveal tribochemical reactions when copper oxides are present, irrespective of whether they form during sliding or are existent from the beginning. Most strikingly, a reduction of copper oxide to metallic copper is observed in X‐ray photoelectron spectroscopy measurements. A more accurate understanding of tribo‐oxidation will allow for manufacturing well‐defined surfaces with enhanced tribological properties. This paves the way for extending the lifetime of contacts evincing tribo‐oxidation.

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The effects of surface oxidation and segregation on the adhesional wear behavior of aluminum—bronze alloys

Cited by 15 publications

References 23 publications

Evaluation of physical, mechanical and sliding wear properties of in-situ AB-TiC composite: a comparison with NAB alloy

Evaluation of physical, mechanical and sliding wear properties of in-situ AB-TiC composite: a comparison with NAB alloy

Wear behaviour ofin situCu–Al₂O₃composites produced by internal oxidation of as cast alloys

How Tribo‐Oxidation Alters the Tribological Properties of Copper and Its Oxides

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The effects of surface oxidation and segregation on the adhesional wear behavior of aluminum—bronze alloys

Cited by 15 publications

References 23 publications

Evaluation of physical, mechanical and sliding wear properties of in-situ AB-TiC composite: a comparison with NAB alloy

Evaluation of physical, mechanical and sliding wear properties of in-situ AB-TiC composite: a comparison with NAB alloy

Wear behaviour ofin situCu–Al2O3composites produced by internal oxidation of as cast alloys

How Tribo‐Oxidation Alters the Tribological Properties of Copper and Its Oxides

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Product

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Wear behaviour ofin situCu–Al₂O₃composites produced by internal oxidation of as cast alloys